Description
Bug description
After 2.11 dataclass with dict causes fatal error.
Example code:
"""Example of fatal pylint error with dataclass."""
from typing import Dict, List, Any
from dataclasses import dataclass, field
@dataclass
class SomeData:
"""A dataclass."""
a_dict: Dict[str, List[str]] = field(default_factory=dict)
@dataclass
class SubSomeData(SomeData):
"""A subclass of a dataclass."""
def __init__(self, **kwargs: Dict[str, Any]) -> None:
"""Subclass init func."""
super().__init__(**kwargs)
if "test" in self.a_dict:
print(self.a_dict["test"])Configuration
No response
Command used
pylint pylint_test.pyPylint output
Exception on node <If l.19 at 0x206550d06c8> in file '..\pylint_test.py'
Traceback (most recent call last):
File "...\lib\site-packages\pylint\utils\ast_walker.py", line 75, in walk
callback(astroid)
File "...\lib\site-packages\pylint\checkers\base.py", line 1104, in visit_if
self._check_using_constant_test(node, node.test)
File "...\lib\site-packages\pylint\checkers\base.py", line 1142, in _check_using_constant_test
inferred = utils.safe_infer(test)
File "...\lib\site-packages\pylint\checkers\utils.py", line 1181, in safe_infer
value = next(infer_gen)
File "...\lib\site-packages\astroid\nodes\node_ng.py", line 105, in infer
yield from self._infer(context, **kwargs)
File "...\lib\site-packages\astroid\inference.py", line 872, in _infer_compare
retval = _do_compare(lhs, op, rhs)
File "...\lib\site-packages\astroid\inference.py", line 842, in _do_compare
left, right = _to_literal(left), _to_literal(right)
File "...\lib\site-packages\astroid\inference.py", line 814, in _to_literal
return ast.literal_eval(node.as_string())
File "...\lib\site-packages\astroid\nodes\node_ng.py", line 547, in as_string
return AsStringVisitor()(self)
File "...\lib\site-packages\astroid\nodes\as_string.py", line 55, in __call__
return node.accept(self).replace(DOC_NEWLINE, "\n")
File "...\lib\site-packages\astroid\nodes\node_ng.py", line 186, in accept
return func(self)
File "...\lib\site-packages\astroid\nodes\as_string.py", line 185, in visit_classdef
args += [n.accept(self) for n in node.keywords]
TypeError: 'NoneType' object is not iterable
************* Module pylint_test
pylint_test.py:1:0: F0001: Fatal error while checking 'pylint_test.py'. Please open an issue in our bug tracker so we address this. There is a pre-filled template that you can use in 'C:\Users\chewitt\AppData\Local\pylint\pylint\Cache\pylint-crash-2021-09-17-09.txt'. (fatal)
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Your code has been rated at 10.00/10 (previous run: 10.00/10, +0.00)Expected behavior
As on 2.10:
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Your code has been rated at 10.00/10 (previous run: 10.00/10, +0.00)
Pylint version
2.11.*astroid==2.8.0
OS / Environment
Windows 10
Additional dependencies
No response